Maximizing the visible light photoelectrochemical activity of B/N-doped anatase TiO2 microspheres with exposed dominant {001} facets
Abstract
Anatase TiO2 microspheres with exposed dominant BBBBB001BBBBB facets were doped with interstitial boron to have a concentration gradient with the maximum concentration at the surface. They were then further doped with substitutional nitrogen by heating in an ammonia atmosphere at different temperatures from 440 to 560°C to give surface N concentrations ranging from 7.03 to 15.47 at%. The optical absorption, atomic and electronic structures and visible-light photoelectrochemical water oxidation activity of these materials were investigated. The maximum activity of the doped TiO2 was achieved at a nitrogen doping temperature of 520°C that gave a high absorbance over the whole visible light region but with no defect-related background absorption.
Citation
Hong , X , Kang , Y , Zhen , C , Kang , X , Yin , L-C , Irvine , J T S , Wang , L , Liu , G & Cheng , H-M 2018 , ' Maximizing the visible light photoelectrochemical activity of B/N-doped anatase TiO 2 microspheres with exposed dominant {001} facets ' , Science China Materials , vol. 61 , no. 6 , pp. 831-838 . https://doi.org/10.1007/s40843-018-9234-y
Publication
Science China Materials
Status
Peer reviewed
ISSN
2199-4501Type
Journal article
Description
This work was supported by the Major Basic Research Program, Ministry of Science and Technology of China (2014CB239401), the National Natural Science Fundation of China (51422210, 21633009, 51629201 and 51521091), the Key Research Program of Frontier Sciences CAS (QYZDB-SSW-JSC039). Liu G thanks Newton Advanced Fellowship.Collections
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